7 day weather forecast

 Effective as of 4:00 PM Tuesday May 18 2021

Explanatory notes:

The weak trough within the vicinity triggers some development of showers mainly offshore overnight with the very slight chance of development over inland areas during the early afternoon, clearing thereafter with a ridge of high pressure building to the south.

Possible fog early on Wednesday depending on cloud cover with moist low level air.

A significant cold front moves over the region on Saturday with a cold and unstable air mass in its wake bringing showers and the possibility of thunderstorms depending on the depth of the instability.

The rest of Tuesday May 18:

City:

Partly cloudy.

Chance of any rain:10%

Perth Metropolitan Area:

Partly cloudy.The slight chance of a shower or thunderstorm.Winds southwesterly at 5-15 km/h becoming light in the evening.

Wednesday May 19:

City:

13-23  Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm

Perth Metropolitan Area:

Partly cloudy.Areas of fog possible early.A slight(30%) chance of a shower most likely near the coast in the morning and inland in the afternoon.Light winds tending south-southwesterly at 10-20 km/h in the afternoon becoming southeasterly at night.​

Thursday May 20:

City:

11-25  Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.Areas of fog possible early.A slight(30%) chance of a shower most likely near the coast in the morning and inland in the afternoon.Light winds tending south-southwesterly at 10-20 km/h in the afternoon becoming southeasterly at night.​

Friday May 21:

City:

11-24  Degrees Celsius

Mostly sunny.

Chance of any rain:20%

Amount:Nil

Perth Metropolitan Area:

Mostly sunny.Light winds tending south-southwesterly at 10-20 km/h in the afternoon.

Saturday May 22:

City:

13-21  Degrees Celsius

Showers.

Chance of any rain:95%

Amount:8 to 20 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A very high (95%) chance of showers.Winds northwesterly at 15-30 km/h shifting southwesterly later during the day.

Sunday May 23:

City:

10-18  Degrees Celsius

Showers.

Chance of any rain:95%

Amount:6 to 20 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A very high (95%) chance of showers.The chance of a thunderstormWinds west-southwesterly at 20-35 km/h.

Monday May 24:

City:

9-17  Degrees Celsius

Showers.

Chance of any rain:90%

Amount:3 to 10 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A very high (90%) chance of showers.The chance of a thunderstorm early.Winds southwesterly at 10-25 km/h.

Tuesday May 25:

City:

8-19  Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm

Perth Metropolitan Area:

Partly cloudy.A slight (30%) chance of showers.Light winds.

Charts:

                                   

Figure 1.Surface synoptic chart.Image courtesy of the Australian Bureau of Meteorology(BOM).

 2. 

Figure 2.Key features identified on True Colour RGB satellite image.Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image. Image courtesy of the Australian Bureau of Meteorology(BOM)

Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

No liabilities held from information consumed on this site. Weather icons are from the US National Weather Service.Some information on this site is from the Australian Bureau of Meteorology (BOM).